The Hydrox was a more subtle tasting cookie of the same genre -- the folks from Oreo now own the recipe and it is nowhere to be found -- they had a commemorative Hydrox and it was just an oreo fashioned in a different die.

You did/do not have local similar ones in the UK ?
Regular Oreo can be bought at various places here, both regular shops as wholesale.
But there's still more than one generation around that grew up with the queso version, which may be an early (post-ww2) Oreo clone.

Why some items reach a national trademark status is pretty interesting.
(i'm way too scared to read the annual lb/p mayonaise consumption figure of Cheesica)

(think ketchup and the US, times 10. In my home, on average >1/3d gallon a week, kcal equivalent of ~1.5gal Velveeta)

Cheese Wiz for me, in the little squeezy weezy.

__________________
"The question of who is right and who is wrong has seemed to me always too small to be worth a moment's thought, while the question of what is right and what is wrong has seemed all-important."